ETF Calculator · Growth & Expense Ratio Impact

ETF Calculator

Initial + yearly investments · Expense ratio impact · True cost of ETF fees.

Currency
Investment Details
$
$
yrs
%
%
Formula: FV = Initial × (1 + net)n + Yearly × [((1 + net)n − 1) ÷ net]  ·  Where net = Expected return − Expense ratio.
ETF Growth Projection
✅ Growing Portfolio
Future value of total investment: —
—
📈 Future value of total investment
—
💸 Total cost of ETF
—
🎯 Total FV with ETF's expense ratio
—
Total Invested
—
Total Gain
—
Net Return
—
Fee as % of Gains
—
Where Your Final Value Comes From
No-Fee vs Your ETF After 20 Years
💡 Interpretation
Enter your ETF details to see the projection.
Year-by-Year Growth Projection
YearInvested (cum.)No-Fee ValueWith ETF FeeCumulative Fee

Powered by Toolraxy

`; embedCodeTextarea.value = ``; }window.toggleEmbedPanel = function() { if (embedPanel.style.display === 'none' || embedPanel.style.display === '') { generateEmbedCode(); embedPanel.style.display = 'block'; } else { embedPanel.style.display = 'none'; } };window.copyEmbedCode = function() { embedCodeTextarea.select(); navigator.clipboard?.writeText(embedCodeTextarea.value).then(() => alert('Embed code copied!')).catch(() => alert('Press Ctrl+C')); };document.addEventListener('DOMContentLoaded', function() { populateCurrency();currencySelect.addEventListener('change', function(e) { const found = currencies.find(c => c.code === e.target.value); if (found) currentCurrency = found; updateCurrencySymbols(); calculate(); });[initialInput, yearlyInput, yearsInput, returnInput, expenseRatio].forEach(el => { if (el) { el.addEventListener('input', calculate); el.addEventListener('change', calculate); } });calculate(); }); })();

ADVERTISEMENT

Relevant Tools

Creator & Maintainer

Image of Faiq Ur Rahman, CEO & Founder Toolraxy

Faiq Ur Rahman

Founder & CEO, Toolraxy

Faiq Ur Rahman is a web designer, digital product developer, and founder of Toolraxy, a growing platform of web-based calculators and utility tools. He specializes in building structured, user-friendly tools focused on health, finance, productivity, and everyday problem-solving.

View Profile

Share:

Rate this Tool

User Ratings:

0
0 out of 5 stars (based on 0 reviews)
Excellent
Very good
Average
Poor
Terrible

ADVERTISEMENT

ADVERTISEMENT

Exchange-traded funds are marketed on cost, and for good reason: a fraction of a percent sounds trivial until it compounds for twenty years. This calculator makes that cost visible. Enter what you’re starting with, what you’ll add each year, and how long you’ll hold, and the tool returns both a no-fee future value and a net value after the fund’s expense ratio, plus the cumulative fee you’d pay across the entire horizon. It’s built for index investors comparing funds, retirement savers projecting a portfolio, and anyone deciding whether a 0.03% ETF is worth switching to from a 0.75% one. All calculations run locally in your browser; your figures are never transmitted or stored, and the tool is free with no sign-up.

 

How to Use the ETF Calculator

  1. Pick the currency your investments are denominated in the symbol updates across every money field.

  2. Enter the initial lump sum you’re putting in today. Set it to zero if you’re starting from scratch.

  3. Add the amount you plan to contribute at the end of each year.

  4. Set the holding period in years. Fractional durations like 12.5 are accepted.

  5. Type the expected gross annual return, this is the return before any fees.

  6. Enter the ETF’s expense ratio as a percentage. Even 0.03% is worth entering for accuracy.

  7. Click a quick-example button, S&P 500 index, total market, bond, sector, international, or high-fee to load a realistic scenario.

  8. Read the three headline figures at the top, then scroll to the year-by-year table to see how the fee drag accumulates.

 

How the ETF Calculator Formula Works

Two annuities run side by side. One grows at the gross return you enter; the other grows at that return minus the expense ratio. The difference between them is the fee.

Formula: No-fee FV = Initial × (1 + r)^n + Yearly × [((1 + r)^n − 1) ÷ r]

Formula: With-fee FV = same formula using net rate = r − expense ratio

Formula: Total cost of ETF = No-fee FV − With-fee FV

Where Initial is the lump sum, Yearly is the annual contribution, r is the gross annual return written as a decimal, and n is the holding period in years.

Two things are worth understanding about how this is modelled. First, the yearly contribution is treated as an end-of-year payment an ordinary annuity so each annual addition grows for every remaining full year, not for the partial year it was added in. Second, compounding is annual, not monthly. That’s a simplification relative to a real ETF where NAV moves daily and contributions may go in at any point in the year, but it keeps the math readable and the fee comparison clean.

The zero-return edge case is handled separately: if the gross return is exactly zero, the yearly contribution simply sums to Yearly × n rather than triggering a divide-by-zero in the annuity formula. Negative returns are fully supported and will produce a shrinking balance. The holding period is clamped to a 0.5-year minimum; entering zero or a negative value returns the initial investment unchanged.

 

Worked Example

Suppose you start with $12,000, add $6,000 at the end of each year, and plan to hold for 25 years. You expect a 9% gross annual return from a broad-market ETF, and the fund charges a 0.15% expense ratio.

No-fee projection (r = 0.09, n = 25):
Growth factor = 1.09^25 ≈ 8.6235
Initial FV = 12,000 × 8.6235 ≈ $103,482
Yearly FV = 6,000 × ((8.6235 − 1) ÷ 0.09) = 6,000 × 84.71 ≈ $508,234
Total: ≈ $611,716

With-fee projection (net rate = 8.85%, n = 25):
Growth factor = 1.0885^25 ≈ 8.3312
Initial FV = 12,000 × 8.3312 ≈ $99,974
Yearly FV = 6,000 × ((8.3312 − 1) ÷ 0.0885) = 6,000 × 82.84 ≈ $497,000
Total: ≈ $596,974

Total cost of ETF: 611,716 − 596,974 ≈ $14,742

Total invested: 12,000 + (6,000 × 25) = $162,000

Net gain: 596,974 − 162,000 ≈ $434,974

Fee as % of gains: 14,742 ÷ (611,716 − 162,000) ≈ 3.3%

A 0.15% expense ratio, a figure most investors would happily accept costs nearly $14,700 over 25 years. That’s the fee working quietly in the background the whole time, taking a slice of every year’s growth. Push the ratio to 1.5% and the same setup loses roughly $140,000 to fees, which is the difference between retiring comfortably and retiring with a shortfall.

Frequently Asked Questions

What does an ETF calculator actually project?

It projects the future value of an ETF position given an initial investment, annual contributions, an expected gross return, and an expense ratio. The output includes the no-fee future value, the net future value after fees, and the cumulative dollar cost of the expense ratio over the holding period.

 

Why does a small expense ratio matter so much?

Because the fee compounds the same way returns do. A 1% annual fee doesn’t just reduce each year’s return by 1%, it reduces the base that future growth is applied to, and that effect multiplies over time. Over 30 years, a 1% fee can consume 15–20% of a portfolio’s final value.

 

Is the yearly investment added at the start or end of each year?

The formula assumes contributions arrive at the end of each year, which is the standard annuity-immediate convention. If you contribute continuously through the year, the actual result will be slightly higher than the projection, since your money is compounding for longer.

 

What’s a reasonable expense ratio to look for?

For mainstream index ETFs, anything under 0.20% is excellent and under 0.50% is acceptable. Above 1.00% is expensive for a passive strategy. Sector and thematic funds justify slightly higher fees, but only if the exposure is genuinely difficult to replicate cheaper.

 

Does the calculator include trading commissions or bid-ask spreads?

No. It models the fund’s annual expense ratio only. Commissions, spreads, and platform fees are separate costs and are not part of the projection. For long-term holds, those are typically minor compared to the expense ratio.

 

How is this different from a compound interest calculator?

A compound interest calculator typically grows a single lump sum at a single rate. This tool combines a lump sum with an annual contribution stream, and runs two projections in parallel, one gross, one net of fees so the fee cost is explicit rather than something you have to calculate separately.

 

What return rate should I use for a stock ETF?

Long-run historical equity returns have clustered around 7–10% annually for broad US indexes, though with wide year-to-year variation. Some investors plan more conservatively, using 6–8% to account for lower expected future returns. Use a figure you can defend, and test a range rather than a single number.

 

Can I use this calculator for a bond ETF or a sector ETF?

Yes. Change the expected return and expense ratio to match the fund category. Bond ETFs typically expect 4–6% returns with 0.03–0.15% fees. Sector ETFs may expect higher returns with higher fees. The math works the same regardless of the underlying asset class.

 

Why is the “Total cost of ETF” larger than the expense ratio times the years?

Because the fee reduces the compounding base. Each year’s fee shrinks the portfolio slightly, which means the next year’s growth is applied to a smaller number, and that lost growth compounds too. The cumulative cost is therefore larger than the simple ratio-times-years calculation would suggest.

 

Does the calculator handle negative expected returns?

Yes. Enter a negative figure in the return field, down to −20%. The projection will shrink the portfolio over time, and the fee cost calculation still works, the fee reduces a declining balance rather than a growing one.

 

Can I model an ETF with no annual contributions?

Set the yearly investment to zero. The projection becomes a pure compound growth calculation on the initial lump sum, with the fee applied annually.

 

How do I convert a monthly contribution into the yearly field?

Multiply the monthly figure by twelve. A $500 monthly ETF purchase becomes $6,000 in the yearly field. Be aware the calculator assumes that $6,000 is added at year-end, not spread evenly, so a monthly contribution pattern will produce a slightly higher real result than the projection shows.

Financial Disclaimer

This ETF calculator is an educational tool and does not constitute investment advice. Projections assume a constant annual return and a constant expense ratio, which is a simplification, real ETF returns vary year to year, and expense ratios can change. Trading commissions, bid-ask spreads, platform fees, taxes, and tracking error are not modelled. Past returns do not predict future results. Use the output as a planning aid and consult a licensed financial advisor before making investment decisions.

ADVERTISEMENT

ADVERTISEMENT